y=7-2.8/x-2.5

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Solution for y=7-2.8/x-2.5 equation: 


D( x )

x = 0

x = 0

x = 0

x in (-oo:0) U (0:+oo)

y = 7-(2.8/x)-2.5 // - 7-(2.8/x)-2.5

2.8/x+y-7+2.5 = 0

2.8*x^-1 = -(y-4.5) // : 2.8

x^-1 = 0.35714286*(4.5-y)

-1 < 0

1/(x^1) = 0.35714286*(4.5-y) // * x^1

1 = 0.35714286*x^1*(4.5-y) // : 0.35714286*(4.5-y)

2.79999998*(4.5-y)^-1 = x^1

x = 2.79999998*(4.5-y)^-1

x = 2.79999998*(4.5-y)^-1

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